Nolds



(No Model.)

H. PARKIN 8v 0. J. REYNOLDS.

DOOR LATGH.

. 0 i c v e r 7////J n. PETERS. Phptn'kikhngrapher Wuhlnglon. o c

UNITED STATES PATENT OFFICE.

HENRY PARKIN, OF ALBERT- TERRACE BOWV, AND CHARLES JAMES REY-f NOLDS, OF DOWNS PARK ROAD,

ENGLAND.

CLAPTON, COUNTY OF "MIDDLESEX,

DOOR-LATCH.

' SPECIFICATION forming part of Letters Patent No. 300,499, dated June 17, 1884.

Application filed December 4, 1883. (No model.) Ifatented in England May 8, 1888, No. 2,336; in France November 8, 1883,No.

158,430, and in Belgium November 19, 1883, No, 63,249.

To all whom, it may concern:

Be it known that we, HENRY PARKIN, ofAlbert Terrace Bow, and CHARLES, JAMES REY- NoLDs, of Downs Park Road, Clapton, both in the county of Middlesex, England, subjects of the Queen of Great Britain, have invented certain new and useful Improvements in Looks or Fastenings for Railway-Carriage and other Doors, (for which we have received Letters Patent, in Great Britain No. 2,336, dated May 8, 1883; in'France, No. 158,430, dated November 8, 1883, and in Belgium, No. 63,249,dated November 19, 1883,) of which the following is a specification.

This invention has for its object improvements in looks or fastenings for railway-carriage and other doors. V

We, according to our invention, construct a lock or fastening for a door with a sliding bolt, and with a catch carried upon the bolt, which retains the bolt in the unlocked position when the door is open, and these parts and the striking plate are so arranged that in closing the door the catch is first released by pressing back the bolt. moved out of the way or disengaged, and, finally, the bolt is allowed to shoot forward behind the retaining-shoulder of the strikingplate. In opening the door the bolt is drawn back by the handle, and the retaining-catch drops in before the bolt is clear of the striking-plate.

. Figure 1 is a side view of a sliding-bolt or draw-latch lock of this construction, with the latch or bolt in the position itoccupies when the door is open. Fig. 2 is a section of the lock, showingthe working parts. Fig. 3 is a side view of the striking-plate. Figs. 4 are sections of the same, taken 011 the lines 1 l and 2 2; and Fig. 5 is a plan of the retaining catch and spring.

In these figures, h is the lock-case; i, the spring bolt or latch, which has a tail, 2'. Its front end is sloped or rounded off where it rubs against the striking-plate, and it is shot forward by a flat coiled spring, 3', surrounding the tail of the latch.

k is a retaining-catch, acted upon by a. flat spring, Z, attached to it, and which bears against'the cover-plate of the look. at is a tumbler through which the handle-spind1e passes. The spring-actuated retaining-catch The catch is then.

moves with the latch, and it serves to pre-, vent the latch ,being shot forward, while the door is open, beyond the position it occupies in Fig. 1. In this position farther outward movement of the latch is arrested by engagement of theretaining-catch with the lock plate, the hooked end kof the retaining-catch dropping into a hole, h formed in the lock plate. To close the door no turn of the handle is needed. It is effected by a simple pressure on the door. The rounded or inclined side of the latch first comes against an incline or curved surface, at, on the strikingplate a, and forces the latch inward sufficiently to release the catch k. The outer end of the catch then comes against a projection,-a-, which lifts thehooked end clear from the hole in the case. Further movement of '70 the door allows the latchi to drop behind the incline n. It then shoots forward to its fullest extent, and securely fastens the door. The releasing-catch moves with it, but the hook is kept from engaging with the hole in or rubbing onthe'interior of the lock-case by its outer end resting against the projection at n.

By constructing locks in the above way, so that the bolt has to be moved back a distance before its retaining-catch is turned or moved into a position to set it out of ac tion, undercut catches may be used, whereby a very secure hold is obtained, and yet, when the door is being closed, the catch can be turned or moved out of the way with the 85 greatest ease, and without the engaging surfaces being subjected to any wear or pressure;

Having thus described the nature of our said invention and the manner of'performing the same, we would have it understood that we claim The combination of thelock-case, the spring bolt, the recessed striking-plate, the springactuated retaining-catch upon and reciprocating with the bolt, and means, substantially 5 such as described, for engaging the catch with the lock-plate, these members being and 0p-." eratin g substantially as hereinbeforc set forth.

HENRY PARKIN. CHARLES JAMES REYNOLDS. \Vitnesses:

JOHN DEAN, NVALTER JAMES SKERTEN,

Both, oft? Graoechurch Street, London. 

